Typewriting machine



e 15 o. THIEME TYPEWRITING MACHINE Filed March 23, 1925 Patented Feb. 15, 1927.

UNITED STATES PATENT OFFICE.

OTTO TI-IIEME, OF HARTFORD, CONNECTICUT, ASSIGNOR 'I'O UNDERWOOD COMPUTING IVIAOHINE COMPANY, OF NEIV YORK, N. Y., 'A CORPORATION OF NEW YORK.

TYPEWBJITING MACHINE.

Application filed March 23, 1925.

; This invention relates to improvements in clips or devices for clamping work-sheets upon a collating table of a typewriting machine. This invention may be used in connection with machines shown, for example, in the application of Henry Resch, Serial No. 731,931, filed August 1 1, 1924.

In said Resch application a clamp com prises two fingers having relative play, and a spring, so that should they be out of parallelism with the face of the table, one finger may first engage the table to hold the worksheet, after which a further movement 01 the clamp causesthe other finger to engage the table also.

The present invention presents a simple device, in which two gripping pads yoked to each other are rockable upon a swingable mount, the latter extending horizontally and substantially parallel with the face of the collating table, so that if one of the gripping pads engages the table first, the yoke element will rock about a transverse pivot or stud on the frame until the second pad engages the table.

Another feature of the invention relates to means to prevent excessive movement of the yoke about its axis, so as to keep it from shifting from a substantialoperative position. To this end said yoke is provided with a hub to receive the stud and having end slots therein, into which slots extends a crosspiece that supports the stud of said gripping or clamping element; said cross-piece being slightly thinner than the slot, so as to permit a slight pad-aligning movement of said gripping elcment about its axis, when said pads engage the table.

The cla mp as a whole :is pivotally supported by means of a shaft extending parallel to the table, and is held in its effective or ineffective positions by a spring which acts on both sides of the clamp-shaft. There is provided a stop which arrests the clamp in its ineffective position.

Other features and inafter appear.

In the accompanying. drawings,

Figure 1 is a cross-sectional view, in elevation, through the carriage and platen, showadvantages will here Serial No. 17,543.-

ing the clamp in its effective position against clamp, partly in cro'ss-section, showing the clamp in its effective position.

Figure 4 is a plan view of the clamp, partly in cross-section, showing the clamp in its ineffective position.

Figure 5 is a perspective view of the clamp dismembered to show more clearly the relative'details of construction.

A record-sheet having a superposed sheet of carbon-paper is inserted, leading edge first, down a rear paper-table 11 under a platen 12, co-operating with feed-rolls 13, up in front of theplaten, and over a front table at the delivery side of the platen. The feed-rolls are then released to position the record-sheet against an upturned edge 14: on one of the. sections of the front table. A paper-clamp 15 is swung against the table to hold the record-sheet in place while inserting a statement-sheeet 16 around the platen and over the record-sheet on the front table. The statement-sheet is squared up against an upturned edge 17 on the other section of, the table. I/Vhile holding the statement-sheet with one hand the feed-r0lls are thrown to their effective position and the clamp is released, so that the two sheets may be line-spaced around the platen. The platen is mounted on a shaft 18 which is journaled in end plates 19 and is provided with finger-wheels 20 at the ends thereof.

In order to render this device more adaptable to sheets of different widths, the front table is made in two sections 21 and 22, each laterally adjustable relatively to each other and also relatively to the platen. The two sections are slidably mounted on a crossbar 23 by means of screws 24; fitting into elongated slots 25 in the table. At the ends of the cross-bar there are provided downwardly-extending brackets 26' which are made fast to the platen-frame 19 by. means of screws 27. The brackets are designed to hold the table in a plane tangential to theselv'es to variable work-sheet conditions and plane and slightly inclined toward the rear of the machine.

The clamp is designed to grip the recordsheet at two points against the section 22 of the front table, and in order to equalize the pressure of the two clamping pads, there is provided a clamping yoke 28 having two lateral "tabs 29 at the ends thereof, which may be covered with rubber 30 to increase the grip on the sheet. At the center, the yoke 28 is fast to a hub 31 and is rockably mounted upon a stud 32 which is fast to a plate 33 forming an integral part of a sleeve 34. Said sleeve may be pivotally mounted upon a long shouldered screw 35, or a shaft supported by a bracket 36 which is in turn fast to theedge 14 of the front table. The clamp is manually operable by means of a lever 37 fast to the sleeve 34, said lever being provided with a thumb-piece 38 to facilitate the operation of rocking the clamp, which is held in either effective or ineffective position by the tension of an over-center spring 39. One end of the spring 39 is fast to the bracket 36 at 40, while the other end is mounted on a stud 41 fast to the plate 33. By the action of said spring the clamp may be held either in its effective position as shown in Figure 3, or in its ineffective position as shown in Figure l, in both positions the line of pull of the spring is at one side of the fulcrum screw 35 upon which the clamp swivels or rocks.

The clamping yoke 28 is approximately located relatively to the table by means of a slot 42 cut into the end face of the hub 31 which loosely fits extending interlocking portions 48 of the plate 33. A screw 44: fitting into a tapped hole 45 in the free end of the stud 32 serves as a means to hold the clamping yoke in place.

To further increase the grip of the clamp against the table, there are provided lips 46 formed therein at the points where the gripping pads 30 come in contact with the table. As it will be apparent from Figure 1 when the clamping yoke is in its effective position bearing against the lips which are covered with rubber pads ll, the recordsheet. is held positively between the rubber pads and at two widely separated points, both clamping points adjusting themselves to hold the sheet with the same pressure.

It will be noted that the clamping element is a rockable yoke that includes two widely separated clamping pad-members; that-the yoke rocks upon a stud between the two padmemb'ers; that the stud forms an integral part of a frame rockable upon a shaft on the paper-table and at right angles to the plane of the stud; that the yoke has a limited rocking movement upon the stud to allow the pads thereon to adjust thenr to prevent excessive movement of the yoke when raised to a non-clamping position; and that the tension at both pads of the yoke is uniformly derived from a single spring tension that jointly controls the clamp-carrying rockable frame.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claimr 1. In a typewriting machine having a revoluble platen, the combination of a table for positioning a work-sheet at the delivery side of said platen, a paper-clamp for positively holding the work-sheet, including a rockable frame carrying a clamping yoke that is independently rockable on the frame, and a spring to jointly tension the frame and the yoke.

2. In a type'writing machine having a revoluble platen, the combination of a table for positioning a work-sheet at the delivery side of said platen, a paper-clamp for positively holding the work-sheet on said table, the clamping means including a frame rockable upon the table and carrying a clamping yoke that is independently rockable on said frame, and a spring effective at one position to jointly tension the frame and the yoke and at another position to hold the clamp in its inoperative position away from the table.

3. In a typewriting machine including a revoluble platen, the combination of a table at the delivery side of the platen to support and gage a work-sheet, and a clamp mounted upon the table to bind the gaged worksheet to the table while another sheet is adjusted and gaged to the platen, said clamp including a rockable frame carrying a self adjusting clamping yoke that is relatively rock-able transversely of the rockable frame.

a. In a typewriting machine including a revoluble platen, the combination of a table at the delivery side of the platen to support and gage a work-sheet, a clamp mounted upon the table to bind the gaged work-sheet to the table wnile another sheet is adjusted and gai ed to the platen. said clamp including a rockable frame, a spring therefor, and a clamping element pivoted thereto to rock transversely thereof.

5. In atypewriting machine including a platen, the combination of a collating table at the front of the platen to gage a worksheet, and a clamping member operatively journaled to the table and provided with a spring to hold the clamping member in either of two positions, said clamping member i eluding a frame to which is pivoted an equalizing yoke having two gripping jaws disposed at either side of their pivot to llll equally distribute the pressure from the spring to both jaws of the yoke.

6. In a typewriting machine including a platen, the combination of a collating table at the front of-the platen to vgage a worksheet, a clamping member operatively journaled to the table and provided with a spring to hold the clamping member in either of two positions, said clamping member including a frame, a stud on the frame and an equalizing yoke journaled upon the stud and having two gripping jaws disposed at either side of the stud to equally distribute the pressure from the spring to both jaws of the yoke, and interlocking means between the frame and the yoke to prevent the yoke from shifting from a substantially operative position when released.

7. In a typewriting machine including a platen, the combination of a collating table at the front of the platen to gage a worksheet, a clamping member operatively journaled to the table and provided with a spring to hold the clamping member in either of two positions, said clamping member including a frame, a stud on the frame and an equalizing yoke having two gripping jaws to equally distribute the pressure from the spring to both jaws of the yoke, and interlocking means between the frame and the yoke to prevent the yoke from shifting from a substantially operative position when released, said yoke including a hub, a supporting stud for the hub, mounted on a plate, the plate forming tongues that engage with slots in the hub, said slots being slightly wider than the tongues to allow the yoke a slight rocking motion, independently of the frame, and a screw to hold the yoke in operative position upon the stud.

8. In a typewriting machine having a platen, the combination of a table at the delivery side of said platen, means to grip a work-sheet upon said table, said means including a bracket fast to the table, a member having a finger-piece fast to a sleeve roekably mounted on said bracket, a plate fast at the other end of said sleeve, a stud fast on said plate and a gripping yoke rockably mounted on said stud, means to limit the movcinent of the gripping yoke on the stud, and means to hold the gripping yoke either in its effective or ineffective position.

9. In a typewriting machine having a platen, the combination of a table at the delivery side of said platen, means to grip a work-sheet upon said table, said means including a bracket fast to the table, a member having a finger-piece fast to a sleeve rockably mounted on said bracket, a plate fast at the other end of said sleeve, a stud fast on said plate and a gripping yoke rockably mounted on said stud, means to limit the movement of the gripping yoke on the stud,

and means to hold the gripping yoke either in its effective or ineffective position, said last-mentioned means including a spring swingab-le across the axis of the rocking memberhaving one end fast to the bracket and the other end mounted on the stud fast to the plate.

10. In a typewriting machine including a revoluble platen, the combination of a table at the delivery side of the platen to support and gage a work-sheet, and a clamp mounted upon the table to bind the gaged work-sheet to the table while another sheet is adjusted and gaged to the platen, said clamp includinga sleeve, an arm and a stud journaled to the table as a unit, and a yoke journaled upon the stud and having a pair of paperclamping pads.

11. In a typewriting machine including a revoluble platen, the combination of a'talole at the delivery side of the platen to support and gage a work-sheet, a clamp mounted upon the table to bind the gaged work-sheet to the table while another sheet is adjusted and gaged to the platen, said clamp including a sleeve, an arm and a stud journaled to the table as a unit, and a yoke journaled upon the stud and having a pair of paperclamping pads, and a single spring operative to hold the clamp in either clamping or nonclamping positions.

12. In a typewriting machine including a revoluble platen, the combination of a table at the delivery side of the platen to support and gage a work-sheet, and a clamp mounted upon the table to bind the gaged worksheet to the table while another sheet is adjusted and gaged to the platen, said clamp including a sleeve, an arm and a stud journaled to the table as a unit, and a yoke journaled upon the stud and having a pair of paper-clamping pads, said yoke having means operative to limit the rocking movement thereof in two directions.

13. In a typewriting machine including a revoluble platen, the combination of a table at the delivery side of the platen to support and gage a work-sheet, a clamp mounted upon the table to bind the gaged worksheet to'the table while another sheet is adjusted and gaged to the platen, said clamp including a sleeve, an arm and a stud journaled to the table as a unit, and a yoke journaled upon the stud and having a pair of paper-clamping pads, and fixed pads upon the table, positioned to align and coact with the movable pads on the rocking yoke to grip the worksheet between them.

it. In a typewriting machine including a revoluble platen, the combination of a table at the delivery side of the platen to support and gage a work-sheet, and a clamp mounted upon the table to bind the gaged work-sheet to the table while another sheet is adjusted and gaged to the platen, said clamp including a rockable frame, a stud on the frame and a clamping "yoke rockable o11'the stud and'formed'with clamping'pads disposed at right angles to the yoke.

15. In a typewriting machine including a 'revolubl'e platen, the combination of a table at the delivery side of the platen to support and gage a W0rk-sheet,'and a clamp mounted upon the table to bind the gaged Worksheet to the table While another sheet is frame clamping pads to press the Work-sheet 1 adjusted and gaged t0 theplaten, said clamp 1 including a rockable frame, a, transverse stud on the frame and a clamping yoke rockable upon the stud independently of the and formed with self-adjusting against the table.

OTTO THIEME. 

